Home / 1,218.15-1,815.65-1,148.96

Finding the Fourth Proportional to 1,218.15, 1,815.65 and 1,148.96

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Solution

The fourth proportional to 1,218.15, 1,815.65 and 1,148.96 is: 1,712.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.15 : 1,815.65 = 1,148.96 : x
  2. Step 2: Convert to fraction form
    1,218.15/1,815.65 = 1,148.96/x
  3. Step 3: Cross multiply
    1,218.15x = 1,815.65 × 1,148.96
  4. Step 4: Simplify right side
    1,218.15x = 2,086,094.40
  5. Step 5: Solve for x
    x = 2,086,094.40/1,218.15
  6. Step 6: Final answer
    x = 1,712.51

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.